"Blood in Motion" is a textbook in cardiovascular science. It sets out to introduce, entice and explain the cardiovascular system to the reader using a classical system in teaching: anatomy, physiology, general operation and specific systems. It is specifically designed to support the interests of students and experienced physiologists and clinicians. The book is subdivided into four parts which comprise a total of 15 chapters. Part I, including the first two chapters, presents a historical perspective of cardiovascular knowledge and complements that with chapter 2 which deals with current insight into the physiology of the cardiovascular system. Part II explores sections of the circulatory loop, starting with an in-depth treatment of the veins, and including the lymphatic, the microcirculation, the arterial system and the heart. Part III incorporates approaches to the cardiovascular system as a whole, both in physiology and in science, such as modeling. This section introduces Impedance-defined flow and offers the reader its application in mathematical modeling. Part IV offers the answers to questions presented in each of the chapters in Part I through III, a summary as well as all the references listed alphabetically by first author. The design is such that each chapter can be read or studied as an independent unit.